Experimental and theoretical evidence for the chemical mechanism in SERRS of rhodamine 6G adsorbed on colloidal silver excited at 1064 nm

被引：30
|
作者：
Dong, Bin [1 ,2 ]
Liu, Liwei [3 ]
Xu, Hongxing [1 ,4 ]
Sun, Mengtao [1 ]
机构：
[1] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China
[2] Dalian Nationalities Univ, Sch Sci, Dalian 116600, Peoples R China
[3] Chinese Acad Sci, Suzhou Inst NanoTech & NanoBion, Suzhou 215125, Peoples R China
[4] Lund Univ, Div Solid State Phys, S-22100 Lund, Sweden
来源：
JOURNAL OF RAMAN SPECTROSCOPY | 2010年 / 41卷 / 07期
基金：
中国国家自然科学基金;
关键词：
SERS; chemical mechanism; 1064; nm; charge transfer excited state; SURFACE-ENHANCED RAMAN; SCATTERING;
D O I：
10.1002/jrs.2605
中图分类号：
O433 [光谱学];
学科分类号：
0703 ; 070302 ;
摘要：
The evidence for the existence of a chemical mechanism in surface-enhanced resonance Raman scattering (SERRS) of rhodamine 6G (R6G) adsorbed on colloidal silver excited at 1064 nm is reported on the basis of experimental and theoretical analyses. A weak absorption peak at around 1060 nm for R6G-functionalized silver nanoparticles was observed, which is not present in the individual spectra of R6G or silver nanoparticles. Theoretically, the charge difference density reveals that this weak absorption is a metal-to-molecule charge transfer excited state. Copyright (C) 2010 John Wiley & Sons, Ltd.
引用
收藏
页码：719 / 720
页数：2
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